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Description of problem:
There is no assigned port number to the container_port_t label.
Before container_port_t has at least 2375/tcp port assigned.
Is this a regression or intentional change and port assigment is now left to be done by sysadmin? documented?

Version-Release number of selected component (if applicable):
container-selinux-2.33-1.git86f33cd.el7.noarch

How reproducible:
deterministic

Steps to Reproduce:
1. Install container-selinux 
# yum install container-selinux
...
# semodule -l | grep -e container -e docker
container	2.33.0

2. List defined port labels 
# semanage port -l |grep -e container -e docker
<empty>

Actual results:
no port defined for container_port_t label

Expected results:
2375/tcp (and 2376/tcp?) defined for container_port_t label


Additional info:
# seinfo -xtcontainer_port_t
   container_port_t
      port_type
   Aliases
      docker_port_t

>>> defined_port_type is missing

Franticek add this 

semanage port -a -t container_port_t -P tcp 2375
TO docker post install

Just FYI this port is already assigned to foreman_container_port_t on Satellite 6 installations, therefore your command will fail on these deployments. I recommend to grep port list before adding the port.

I wish semanage allowed "add-when-missing" or "ignore-when-present" options, grepping is hard as ports can be specified also as ranges.

Here is how we do it in Satellite 6:

https://github.com/theforeman/foreman-selinux/blob/develop/foreman-selinux-enable#L23-L27

We have no plans to ship another version of Docker at this time. RHEL7 is in final support stages where only security fixes will get released.  Customers should move to use Podman which is available starting in RHEL 7.6.